Is Windows Explorer starting to look plain because it doesn't have a lot of features? Try QTTabBar. It is an add-in for Windows Explorer that gives it many features such as tabs, folder grouping, and histories. QTTabBar can be used with Windows Vista and Windows Xp + .Net Framework 2.0 or later.

Download: QTTabBar

Do you want to get rid of the annoying messages that pop up in Windows that say : Cannot delete file: Access is denied. If you want to take more control of your Windows system then try Unlocker. Unlocker is a free Windows Explorer extension that lets you right-click the mouse on a file or folder to get rid of common error messages. Learn more about Unlocker or if you want to try it out  Download it from the official website. Unlocker is freeware